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460                                    THE IRON INDUSTRY.
Marquette the once famous Lake Angeline mines are fast Hearing the end of their fine Bessemer ores, and there remains but a few years more of their production. All the mines of the Oliver Company on that range are now classed as non-Bessemer, and the Cleveland Cliffs are light in their Bessemer production. The ore bodies under Lake Angeline are not furnishing the percentage of high-grade ores expected. Explorations on the range are showing few Bessemer deposits. On the Gogebic one company controls four-fifths of the deposits, and a large share of the rest is off the market. Explorations around the old Comet and Puritan, Federal and Jackpot group are said to be producing good results, and there are hopes of some tonnage in that section. On the Vermilion the hard ore property at Tower is now a producer of non-Bessemer ores exclusively. The Chandler in a few years will be exhausted. The new mines of the Oliver Company are large properties, but have no effect on. the general situation, as the owners will retain their ores for their own use. On the Mesaba low-grade non-Bessemers are much in excess of its fancy ores. There are large deposits of lean ores and of ores high in phosphorus, or of ores so fine and dusty that they are discriminated against; but of high-grade desirable Besse-mers the discoveries can be counted quickly. It would appear that the larger deposits of the range have been found."
Table XXII-K gives a list of the important mines in the Lake region. The division is arbitrary, embracing only those mines which have produced over one million tons in their lifetime and which turned out over 200,000 tons during 1904. This classification omits a few new mines which produced more than 200,000 tons in 1904, and which may take first rank in the future, but which had not then turned out one million tons.
The output of the mines in this list amounted to fourteen million tons in 1904, or two-thirds of the total for the year. During the lifetime of the Lake Superior field these mines have produced 56 per cent, of the total, so that the chemical composition of these ores may be taken.as representative of the district as a whole. In addition to this list there are several mines which have exceeded the limit of one million tons, but which are shipping less than two hundred thousand tons per year. In this class are the following, the properties of the United States Steel Corporation being marked with a star: